Before COVID, people traditionally sealed their initial introduction to each other with a handshake. Nowadays, that activity seems kind of questionable. But you can still give them something to shake if you build this persistence of vision (POV) business card from [chaosneon] to show your credentials in blinkenlights form.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/06/11/2024-business-card-challenge-make-them-shake-your-handiwork/